CVE-2026-89855 scsi: qla2xxx: Serialize flash version read in reset handler
A race condition in the qla2xxx SCSI driver allows local attackers to corrupt flash register reads, potentially causing data corruption or system instability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89855?
CVE-2026-89855 is a vulnerability in Linux, published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Serialize flash version read in reset handler
The "update cache versions without reset" sysfs reset operation (0x20261) calls get_flash_version(), which reads hardware flash registers, without holding ha->optrom_mutex. The VPD update path serializes the same call under optrom_mutex, so this reset path can interleave its flash register accesses with a concurrent VPD or optrom flash operation and corrupt the reads.
Hold ha->optrom_mutex across the get_flash_version() call to match the VPD update path.
Which versions are affected by CVE-2026-89855?
How do I fix CVE-2026-89855?
Apply the vendor's patch.
Is CVE-2026-89855 being exploited?
There is no known exploitation of CVE-2026-89855 in the wild and no public exploit code.
Sources
Also known as AZL-101513, BELL-CVE-2026-89855, DEBIAN-CVE-2026-89855, GHSA-38m8-7cjw-cwc2, UBUNTU-CVE-2026-89855.